Yes, RO water will kill off the pests.
JGoslee - it only takes 1 infected polyp to change your mind, trust me. I keep my params spot on as well, they never waiver. You can't control other ppls tanks and params, and you certainly cannot control what comes out of the ocean. I was singing the same tune as you up until 90 days ago when i rec'd a frag from a trusted online store. I would rather not play russian roulette with my zoos, i have too much invested.